JPH03103571A - Backup material for timbering - Google Patents

Abstract

PURPOSE:To reduce the construction cost by making up the above device of a plurality of column-like members in a specified length placed in parallel each other at a specified interval and connected with the connecting members, and by applying the same to the rear sides of pressure-receiving surfaces of to-be-supported members of a form for bearing the injection pressure of concrete. CONSTITUTION:A backup material is made up in a bridged shape by connecting two column-like members 1 and 1 with connecting members 2 at six points; at the opposite ends thereof and four points positioned at equal intervals in between. A space in which concrete is to be cast is made up of sheathings 3a-3e that are positioned facing the concrete to be cast in a form, and peripheral edges of the panels are reinforced with rails 4. Then the backup materials A are applied to places on the sheathings 3a and 3b where swelling-out is liable to occur by injection pressure of concrete. Wedges 8 are driven into wedge holes of a Form-tie 5 (a wedge-type typing device), making the backup materials A bear the injection pressure being applied to the reverse sides of the sheathings 3a and 3b with pressing members 7 placed thereon. Thereby skilled labor will not be required for timbering, and number of processes therefor can be reduced too.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is directed to, for example, a method for applying concrete injection pressure to the back side of a weir board that guards a formwork for concrete pouring. Concerning back-up materials for shoring and construction, used for the purpose of holding things in place.

(Prior Art) Conventionally, for example, in order to assemble a formwork for concrete pouring of a desired shape to construct a beam part of a reinforced concrete building,
As shown in Figure 8, multiple weir plates 3 made of plywood or metal plates
11 as appropriate to assemble a concrete pouring frame.

In order to perform shoring to hold these weir plates 30 in place against the concrete injection pressure, a peripheral crosspiece 31 is attached to the back side peripheral edge of each shear plate 30, and As shown in Figure 9, for example, 20en is attached to the back side of each weir plate 3o.
A plurality of reinforcing crosspieces 32 are arranged in parallel at intervals.

Next, as shown in FIG. 8, two weir plates 30. are placed facing each other across the concrete injection space S. , 30, a prismatic pressing member 35 is attached to the back side of the weir plate 3o.
A wedge 36 driven into a wedge hole of the home tie 34 is used to press the home tie 34 against the weir plate 30. 31 is fl!
3[i] This is the receiving metal fitting.

Figure 10.11 shows the wall D of a reinforced concrete building.
Moreover, FIG. 12 shows a state in which the formwork for casting the corner post E portions is assembled in the same manner as described above. Shoring for these formworks is carried out in the same manner as for the beams above, so a description thereof will be omitted.

(Problem to be Solved by the Invention) In the above-mentioned shoring, the spacing of the reinforcing crosspieces 32 that reinforce the weir boards 30 is generally set quite close to each other on the inside and outside of 20c+*, so if the surface area of the entire formwork is wide, The number of reinforcing crosspieces 32 is required.

Since the reinforcing crosspiece 32 is made of wood or steel and is quite heavy,
Shoring requires a lot of effort and time, and it takes a certain amount of experience and care to arrange a large number of beams at as even intervals as possible.

Furthermore, removing the heavy reinforcing beams 32 and transporting them to the next construction site after use requires a lot of labor and expense.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a material made of wood or metal E which has been conventionally used to support supports such as weir plates constituting formwork for concrete pouring from the back side of the pressure-receiving surface. It plays a role in place of shoring, requires less number of beams than conventional beams, has a lighter total weight than conventional beams, and requires less labor for shoring. To provide a back-up material for shoring, which greatly reduces costs and is constructed so that even unskilled workers can easily and accurately construct it.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the back-up material for shoring according to the present invention includes a plurality of pieces of a predetermined length arranged in parallel at a predetermined interval. The columnar members 1 are connected to each other by a connecting member 2.11.

It is preferable that both the columnar elongated material 1 and the connecting material 2 are made of synthetic resin and formed into a hollow shape.

(Embodiment) An embodiment of the present invention will be explained below with reference to FIGS. 1 to 6. The backup material A of this embodiment has a ladder-like shape as a whole, as shown in FIG.

1.1 is a columnar member placed in parallel at a predetermined interval, and has a hollow or solid shape as shown in FIG. The height dimension is the same as that of the reinforcing crosspiece 32.

Reference numeral 2 denotes a connecting member that connects the two columnar members 1.1 to each other, and like the columnar member 1, it has a hollow or solid shape (see FIG. 3).

The columnar member 1 and the connecting member 2 may be integrally molded by injection or shaping of synthetic resin, or may be made of fiber-reinforced plastic.

The backup material A of this example is applied to both ends of two columnar members 1, 1 each having a length of about 150 cm, which are placed parallel to each other with an interval of about 20 cm apart, and the space between these two ends. Both columnar members 1, at 6 locations with 4 spaces apart.
1 are connected by connecting members 2 in a bridge-like manner.

Next, the action of the backup material A will be explained with reference to FIGS. 4 and 5, using an example of assembling a formwork for pouring beams of a reinforced concrete building.

In FIG. 4, which is a partial vertical sectional view of the assembled formwork for concrete pouring, B is a beam of the building, and C is a roof or floor.

Denoted at 3a to 3e are weir plates that serve as concrete pouring surfaces of the formwork, and are arranged as shown in the figure to form a concrete pouring space. 4 is a peripheral crosspiece that reinforces the peripheral edge of the weir plate 3.

On the weir plates 3a and 3b facing both sides of the beam B,
As shown in FIG. 5 as a view in the direction of arrow a in FIG. 4,
Select the area where the weir plates 3a and 3b bulge out the most under the concrete injection pressure, and apply the backup material A.

Home ties 5 are used to bring these backup materials A into contact with the weir plates 3 a and 3 b. This hole l3 tie 5 is attached to both protruding parts of an iron rod 6 passed through so as to straddle the two weir plates 3a and 3b. Reference numeral 7 denotes a prismatic pressing member made of wood or metal, which is placed so as to straddle each back side of a plurality of side-by-side weir plates 3a (3b) and to be placed along each platform tie 5. It will be addressed to you.

In this state, by driving the wedge 8 into the wedge hole of the home tie 5, the pressing member 7 comes into contact with the back side of each weir plate 3a, 3b via the backup material A, and applies the concrete injection pressure. Accept and support. 9 is a bracket for wedge 8, approximately L.
It consists of a plate piece bent into a letter shape, and the height dimension is the pressing member 7.
It is almost the same as

Comparing the assembly structure of the formwork with the conventional one shown in Fig. 8.9, in the conventional one, a plurality of reinforcing crosspieces 32 are arranged parallel to the back side of each shedding plate 30. However, in the assembly structure of the above embodiment, instead of this plurality of reinforcing crosspieces 32,
It is sufficient to apply one back-up material 8 for each of the weir plates 3a and 3b to the back measurement.

Therefore, the man-hours required for shoring to receive and support each weir plate 3a, 3b, including the time and effort required to remove the formwork, are significantly reduced compared to the conventional method.

Moreover, unlike in the past, there is no need to pay special attention to arranging the plurality of crosspieces 32 at as equal intervals as possible.
Even relatively unskilled workers can perform reliable shoring work. In addition, backup material A is made by combining hollow or thin-walled materials, and is made of synthetic resin, which has a much lower specific gravity than iron, so it is much more durable than two conventional reinforcing beams 32 of the same length. It is easy to make, and it is easy to assemble and disassemble the formwork.
The labor involved in transporting the backup material A after disassembly can be considerably reduced.

FIG. 6 is a view corresponding to FIG. 11, showing another embodiment in which the backup material A is used to assemble a formwork for pouring a wall D of a reinforced concrete building, and the reference numerals in the figure are from FIG. This corresponds to that in FIG. 3 is a weir plate.

The action of the backup material A in this embodiment is the same as in the above embodiment, so a description thereof will be omitted, but the point is that in the prior art, the plurality of reinforcing beams 32 that reinforced each weir board 30 were
It can be replaced with one backup material A.

FIG. 7 shows another example of cutting the backup material A according to the present invention, in which the columnar member 10.10 and the connecting member 11 are
It is integrally formed into a solid shape by injection or shaping of synthetic resin.

The connecting member 11 is different from the aforementioned connecting member 2 in that it is formed not in a grid shape but in a mesh shape.

In each of the above embodiments, the columnar members 1.10 are hollow or solid prismatic bodies, but they may also be hollow cylinders or hollow or solid columnar bodies with arbitrary irregular cross sections. It's okay.

Further, the connecting member is not limited to the illustrated connecting member 2.11,
In short, two or, if necessary, two or more columnar members 1.
10, etc. are placed parallel to each other at a predetermined interval (or tilted to each other if necessary) and have a shape that allows them to be connected to each other. The shape or arrangement of A is selected so that it is as light and strong as possible. The dimensions of each part, such as the length and width of the backup material A, are of course not limited to the dimensions of the above embodiments, and may be determined as appropriate depending on the size of the weir plates 3, 3a, etc., the strength of the compressive force exerted on the sheath plates, etc. All you have to do is decide.

Alternatively, recycled plastic can be foam-molded to create an inexpensive backup material A.

In each of the above embodiments, a case is shown in which the supporting body is a weir plate for a formwork for concrete pouring, but the supporting body may also be, for example, a temporary earth retaining plate used in civil engineering work. [Effects of the Invention] As is clear from the above explanation, the back-up material for shoring according to the present invention can be used, for example, for shoring of sheir plates (supporting bodies) constituting formwork for concrete pouring. If this is done, various excellent effects as listed below can be achieved, and overall, the construction costs required for shoring can be significantly reduced.

a) Instead of several reinforcing beams that were conventionally placed in parallel on the back side of the weir, it is now sufficient to place l pieces of the backup material of the present invention, which significantly reduces the man-hours required for shoring. It becomes possible to reduce

b) Conventionally, the work of arranging the reinforcing crosspieces in parallel at predetermined intervals required a certain amount of attention, but the backup material of the present invention requires an unskilled person to arrange them in a relatively rough manner. However, it fulfills its role.

C> By making the columnar members and connecting members that make up the backup material hollow, the weight can be significantly reduced while maintaining the necessary strength, so from this point of view as well, the labor required for shoring can be reduced. Alternatively, the effort and expense associated with transporting backup materials can be reduced accordingly.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention,
Figure 1 is a perspective view of the backup material, Figure 2 is the X in Figure 1.
3 is a sectional view taken along line Y--Y in FIG. 1. FIG. Figures 4 to 6 show examples of how the backup material of the present invention is used for shoring of formwork for concrete pouring. Beam (
FIG. 5 is a partial vertical cross-sectional view of a column (column) portion and a view taken in the direction of arrow a in FIG. 4; FIG. 6 is a front view of the wall portion as well. FIG. 7 is a perspective view showing another embodiment of the backup material. Figures 8 to 12 show conventional examples of shoring for concrete pouring formwork, and Figure 8 is a diagram equivalent to Figure 4, and Figure 9
The figure is a diagram equivalent to Figure 5. Figure 10 is a vertical cross-sectional view of the wall;
FIG. 11 is a view taken in direction b of FIG. 10, and FIG. 12 is a plan view of the corner pillar portion. Code Table 1, 10 Column member 2, 11 Connecting member 3, 3a~
3e Weir plate (supporting body) 4 Peripheral crosspiece 5 Form tie 6 Iron bar
7 Pressing member 8PA9 Receiving metal fitting 30 Weir plate 31 Crosspiece 32 Reinforcement crosspiece 33 Punching rod 34 Form tie 35 Pressing member 36 Wedge
37 Bracket

Claims (2)

[Claims] (1) Supports 3a, 3b for concrete pouring formwork, etc.
A plurality of columnar members 1, 1 of a predetermined length are arranged in parallel at a predetermined interval, and are intended for receiving concrete injection pressure, etc., on the back side of the pressure receiving surface of the
This is a back-up material for shoring made by connecting 0 to each other by connecting members 2 and 11. (2) The back-up material for shoring according to claim 1, wherein the columnar member 1 and the connecting member 2 are both made of synthetic resin and have a hollow shape.